Never fired Colt 14.5" M4 barrel assembly. This barrel was installed on an upper and then uninstalled without ever having been fired. The barrel has a NATO chamber, a 1:7" twist and has a chrome lined chamber and bore.

The barrel has a date code of "07/02" and is stamped " C MP 5.56 NATO 1/7".

This barrel has an "F" marked front sight base with bayonet lug and a side sling swivel. Also comes with: